Electrode holder



March 23,1926, 1,577,489

C. C. PECK ELECTRODE HOLDER Filed April 11, 1925 2 Sheets-$heet lINVENTOR.

C2412 C". Peaz/t 9 1%? v ATTIORN Yd OMa-QQM ATTORNEYS,

March 23 1926.

' c. c. PEpK ELECTRODE HOLDER Filed A ril 11, 1925 Patented Mar. 23,1926.

'UNITVEDS'TATES PATENT OFFICE- PANY, OF CLEVELAND, OHIO, A CORPORATIONOF OHIO.

ELECTRODE HOLDER.

Application filed April 11, 1925. Serial No. 22,443.

To all whom it may cancer h:

Be it known that I, CECIL C. PEoK, a c1t1.

-zen of the United States, and a resident of Cleveland, county'ofCuyahoga, andState of Ohio, have invented a new and useful Improvementin Electrode Holders, of which the following is a specification, theprinciple of the invention being .herein explained and the best mode inwhich Ihave contemplated applying that principle, so as to distinguishit from other inventions.

In the use of the electric are for metal working orfor analogousoperations, wherein the electrode'is moved about by hand,

considerable difiiculty has been encountered in providing a satisfactoryholder for such electrode, particularly where the latter is in. the formof a'carbon pencil. It-is neces- Y' the working end ofthe electrode.

1 sary, of course, thatlthe holding implement should permit the operatorto grasp the same at a point not too far removed from A very high.degree of temperature,however, is developed at the point where the arcis thus struck and. ordinary heat insulating means are either to'becumbersome or else inadequate for the proper protection of the user.Furthermore, the pencil, if exposed to the air, tends to oxidize and sowaste away for a considerable distance back from the operating point.

One object of the present invention, ac-- cordingly, is to provide animproved form of electrode holder of portable type wherein means areincorporated for cooling both the implement and the portion of thepencil.

backof its operating point, so that the implement may be handled withoutdiscomfort and the body. of the pencil 'be prevented from reaching anoxidizing temperature.

A further object is to so construct the holder that the current passingtherethrough to the electrode or pencil will be required totraverse thelatter the shortest possible distance.

To the'accomplishment of the foregoing and related ends, the invention,-then, con- .sists of. the means hereinafter fully described andparticularly pointed out in the claims, the-annexed drawin 4 and thefollowing description setting orth in detail certain mechanism embodyingthe invention, such disclosed means constituting, however, but one ofvarious mechanical forms in whidch the principle of the invention may beuse In said annexed drawing Fig. 1 is a side elevation of an electrodeholder embodying my present improvements; Fig. 2 isa broken plan viewthereof; Fig. 3 is a vertical transverse section taken on the planeindicated by the lines 33, Figs. 1 and 2; Fig. 4 is a, sectional view,similar to that of Fig. 3, but showing a modification in construction;Fig. 5 is a side elevation similar to Fig. 1, but showing still afurther modification; and Figs. 6 and 7 V are transverse sectional-viewsof the latter taken on the planes indicated by the lines 66 and 77,respectively, Fi 5.

In the form of the device illustrate in Figs. 1 2 and 3, the mainelement is a longitudinally extending body member 1 formed of aluminumor other metal of high electrical conductivity, aluminum being preferredbecause of its relatively light weight.

CECIL C. PECK, OE CLEVELAND, OHIO, ASSIGNOR T0 'IHE LINCOLN ELECTRICCOM-.-

One end of said member 1 is provided with grasped by the hand of theoperator. Such handle portion 4 furthermore desirably has wrapped aboutit one or more layers of asbestos rope 5 to insure thorough heatinsulation.

The electrode holder 6 is of general cylin drical form, its upper endbeing provided with an offset ear 7 apertured to match the opening 3 inbody member 1, so that said holder may be secured to the body member indesired angular relation by means of bolt- 8 and nut 9, as will bereadily understood. Said holder 6 is pierced with a central aperture 10that extends its entire length and is of uniform diameter save for theportion 10 immediately adjacent the outer or free end of the holder,which is smaller in diameter than the remaining longer portion of suchaperture. The diameter of suchportion 10 in fact is such as to provideclose fitting contact with the electrode 11, shown as consisting of acylindrical carbon pencil, when such electrode is inserted' intheholder. In order to guide as well as properly support the pencil 11,a sleeve or bushing 12 of fiber, or equivalent velectrical insulatingmaterial, is fitted in the main portion of opening 10 to the bore ofsuch sleeve, being of approximately the same diameter as the apertureportion 10. 7

As a result of the foregoing construction, it will be seen that theelectric current entering the main body 1 of the device by way ofconnections 2 will flow into-the electrode proper only at the lowerextremity of holder 6. Such current, in other words, has no occasion totraverse any considerable extent of the pencil within the holder and theconsequent resistance heating effect is confined to such comparativelyshort length of the electrode. It will further be noted that the lowerextremity 13 of the holder is beveled so that it is unnecessary for theelectrode to project any great distance beyond such holder.

Surrounding the holder and in close fitting surface .contact therewithis a spiral tu-' bular coil 14, preferably of copper, the lower end 15of such coil being bent upwardly alongsideand parallel with the axis ofthe coil and thence being'bent at approximately right angles and carriedfor a short distance arallel .with the upper end alongside the odymember 1 of the holder. The extremities of the respective tube ends aresuitably connected with flexible tubular conduits 1 and 18 that extendthence through the hollow handle 4 to a point removedfromthe immediatefield of use of the device where one such conduit, preferably conduit17, .is connected with a pressure water supply and the otheris, allowedto discharge to waste. It will be understood, of course, that' anysuitable cooling medium may becirculated through the conduits 17 .and 18and the coil 14. As shown in Figs. 1, 2 and 3, the tube that comprisescoil 14 is of slightly flattened section in order to increase the areaof contact between same and the holder 6, the exterior surface of'th'eelectrode being that of a plain cylinder.v In Fig. 4, on the contrary,the surface of the latter is formed with a spiral groove 19 in which thecoil 20, here of circular section, lies.

Instead of employing a coil, a cooling chamber closely surrounding theholder may be otherwise provided as for example by means of a shelli20(see Figs. 5, 6 and 7) that is spaced the proper distance from theelectrode holder 21. In the modified construction in question, theholder differs in the first place from the one previously described inthat it is rigidly instead of adjustably secured by means of an integralthreaded sleeve 22 to the tubular handle member 23. In the second place,said holder is formed at its lower end with a flange 24 that is rabbetedto form a tight fitting joint 25 with the lower end of shell 20, apacking ring 26 being furthermore interposed to in-' sure againstleakage. The upper end of the holder extends through the correspondinend of the shell and is externallythreade f to receive a nut 27 wherebythe two parts in question may be secured together. In the third place,it will be noted thatthe insulat- "ing sleeve or bushing between theholder and electrode is omitted, the interior wall of the holder beingsimply spaced from the electrode 11 except at the lower end of theholder with which alone the electrode is in' contact.

The inner face of flange 24 is provided with an annular recess 30 thatforms in effeet a continuation of the annular chamber between the holder21 and shell 20. However, such recess is very nearly closed on from theremainder of such chamber by means of an inwardly directed flange 31 atthe lower end of the shoulder, as clearly shown in Fig. 5. i

The cooling fluid is first led into such annular recess 30 by means of aduct 32 which extends-from flange 31 to a cored out pas sage 33 in thehandle attaching sleeve 22. A flexible tubular conduit '34 is connectedwith such passage 33 through which a cool I ing fluid s supplied, andanother similar conduit 35 is connected with a second passage 36 thatopens directly into the upper end of the annular chamber between shell20 and the electrode holder'21.

Fr'om thelforegoing construction, it will be evident-that the coolingfluid entering by way of conduit 34 will be initially supplied -totheannular recess 3.0: at' the tip of the electrode holder from which itwill escape to the constricted o ening .left between flange 31 andsuchhol er. The fluid thence rises in the annular chamber and escapes byway of passage 36 and conduit 35. The conv striction provided by flange31 insures that the recess 30 willjat all timesfcontain such coolingfluid and the latter is moreover caused tocirculate around the holder inorder to escape rom such recess.

No further description of the manner of use of my improved electrodeholder is" deemed necessary since the use of a device of this sort is 1ngeneral well understood.

fortably warm; in fact, the usual protective mitten may be discarded, ifdesired. Furthermore, ue to the fact that the electrode holder ispositively cooled to its very tip, and in particular in that portionthrough which electrical contact is had with the carbon pencil 11, thelatter is prevented from becoming heated exce t at its exposed workingextremity. The llfe of the pencil is correspondingly prolonged and theoperation, whatever its character, in which the electric arc is beingutilized, is materially facilitated.

In conclusion it should be noted that holder 6 in the case of the firstdescribed form of the device, as well as holder 21 in modified form,will require to be made not only of a metal that is a good conductor ofelectricit, but also one having a high thermal con uctivity. Forpractical reasons I prefer to use hard drawn copper, althou h aluminummay be used and silver would e stillbetter but is too costly.

. member,

'with a handle at one end; an electrode holder secured'to. the other endof said body saidholder being formed with an aperture adapted to receivean electrode pencil; a cooling chamber closely surrounding said holder;and connections for said chamber passing through said handle.

- her said holder being formed with an aper 2. In a device of thecharacter described,

with a handle at one end; an electrode holder secured to the other endof said body memture adapted to. receive an electrode pencil and'havingelectrical contact at its outer endwonly'with, the latter; a-coolingchamber closely surroundin said holder; and'con nections for said 0amber. passing through said handle; i V

3. In a device of the character described,

, the combination of a body member provided with a .handle at one end;an electrode holder secured to the other end of said body member, saidholder beingformeo't with an aperture; 'adapted to receive .an electrodepencil and'having, electrical contact at its outer end only with thelatter; and a cooling chamber closely surroundin said holder,

said chamber being arranged an constructedto conduct the cooling fluidinitially to such contact end of said holder; and connections for saidchamber passing through said handle. i I

4. In a device of the character described,

the combination of a body member provided with a handle at one end; anelectrode holder angularly adjustably secured to the other en t. of saidbody member, formed with an aperture adapted to receive and hold anelectrode pencil; a cooling chamber in the form of a coil closelysurrounding said holder; and flexible connections for said coil carriedby said body member.

5. In .a device of the character described, the combination. of a bodymember provided with a hollow handle at one end; an electrode holderangularly cured to the other end of said body member, saidholder beingformed with an aperture adapted to receive and hold an electrode adjustably sesaid holder being pencil; a cooling chamber in the form of acoil closely surrounding said holder; and

flexible connections for said coil (passing through the hollow handle ofsai body member.

6. In a device of the character described, the combination of a bodymember provided with a handle at one end; an electrode holder angularlyadjustably secured to the other end of said body member, said holderbeing formed with an aperture adapted toreceive and hold an electrodepencil; a bushing of electrical insulating material fitted in theaperture in said holder and preventing electrical contact between thelatter and such pencil except adjacent the free end of with an apertureadapted to receive an elec-' trode pencil" and having electrical contactat its outer end only with the latter; a cool- 101 said holder; acooling chamber in the form' i the combination of a body memberprovidedbody member, said holder being formed .ing chamber in the form of a coilcloselyp surroundin for said coi said connections being arranged 'toconduct the cooling fluid initially to the said holder, andconnectionsend of the coil adjacent such-contact end of 'said' holder.

8'. In .a device, of-the character described, the combination of anelectrode holder formed with an aperture adapted to re ceivean electrodepencil and having electrical contact at its outer end only with thelatter, and a cooling chamber closely surrounding said holder, saidchamber being . an electrode pencil and arranged and constructed. toconduct the cooling fluid initially to such contact end of the holder.

9. In a device of the character described,

the combination of an electrode holder formed with an aperture adaptedto receive aving electrical contact at its outer end on y with thelatter, a cooling chamber, in the form of a coil nections for said coil,said connections being arranged to conduct the cooling fluid initiallyto the end of the coil adjacent such contact end of said holder.-

Signed by me, this 10th day of April, 1925. I

CECIL c. PECK.

closely surrounding said holder, and com 1

